<html>
    <head>
        <style src="text/css">
            div{margin:5px;padding: 10px;border-style: solid;display: flex;transition: background-color,2s;
            align-content: space-between;background-color: white;}
            #tree{width:70%;height: 20%;border-style: none;}
           
        </style>
        <script src="22.js">
        </script>
    </head>
    <body onload="load()">
        <div id="tree">
        </div>
        <button id="loop">loop
        </button>
    </body>
</html>